feat: user search/discovery

Previously the only way to find someone to follow was knowing their
exact username. Add GET /api/v1/users/search (name/username ilike,
excludes blocked-either-way) and a /people page with debounced search
+ inline follow buttons. Linked from the Explore page.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/app/(app)/people/page.tsx

@@ -0,0 +1,16 @@
+import type { Metadata } from "next";
+import { PeopleSearch } from "@/components/social/people-search";
+
+export const metadata: Metadata = { title: "Find People — Epicure" };
+
+export default function PeoplePage() {
+  return (
+    <div className="max-w-2xl mx-auto space-y-6">
+      <div>
+        <h1 className="text-2xl font-bold tracking-tight">Find People</h1>
+        <p className="text-muted-foreground text-sm mt-1">Search for cooks to follow by name or username.</p>
+      </div>
+      <PeopleSearch />
+    </div>
+  );
+}